The phone fell a boot. Inspection found that close to the battery connection in the top right corner of a voltage regulator tube (u102) and the bottom of the keyboard board (that is, by the tail plug) U108 has been damaged, cannot produce electricity, according to the good machine testing found that both two power supply pipe of 2.5 V voltage, but nor fittings may be substituted at hand. Finally came out of a T18 Ericsson mobile phone down on a model for LOCA regulator tube in U102 position, and then fly from 5 feet of a line to U108 5 feet, mount after the commissioning, troubleshooting.e2Zservice manual download site